Subgrader attachment



Mar... .6, 1923.

T. L AVE'RY- SUBGRADER ATTACHMENT.

2 SHEETS-SHEET FILED AUG.22| I921- Thamaa Mar. 6, 1923.

' T. L. AVERY. SUBGRADER ATTACHMENT.

2 SHEETSSHEET 2.

FILED AUG. 22 192]- gr I ,9

Patented Mar. 6, 1923.

UNITED STATES THOMAS LUCIAN AVERY, or PHOENIX, ARIZONA.

SUBGRADER ATTACHMENT.

Application filed August 22, 1921. Serial No. 494,396.

To all whom it may concern:

' a citizen of the United States residing at Phoenix, in the county'of Maricopa and State of Arizona, have invented certain new and useful Improvements in Subgrader Attachments, of which the following is a specification. i 1

This invention relates to certain new and useful improvements in sub-graders and it has for its objects among others to provide a simple, practical and reliable and efficient device attachable to the back of a sub-grader for the purpose of elevating loose dirt which has been acted upon by the grader onto a conveyor belt and thence carrying the same to one side of the roadway and there delivering it. The "elevating and conveying mechanisms are actuated by connection with the source of power on the sub-grader.

My present improvements when applied to the sub-grader are practically within the confines thereof and are not liable to injury or derangement of parts.-

Other objects and advantages of the invention will hereinafter appear and. the novel features thereof will be particularly pointed out in the appended claims.

'Tlie invention, in its preferred form, is clearly illustrated in the accompanying drawings, which, with the numerals of reference'marked thereon, form a part of this specification, and in which- Figure 1 is a top plan, with portions of the sub-grader broken away, showing the application of my elevating and conveying mechanisms.

Figure 2 is an end elevation."

Figure 3 isa side view with portions broken away.

Figure 1 is a view looking at the opposite side from that of Figure 3.

Figure 5 is a section on the line 5-5 of Figure 1 looking in the direction of the ELII'OVS.

Like numerals of reference indicate like parts throughout the several views. 7

As the present invention does not reside in the sub'grader, it has not been thought necessary to show more of the latter than is necessary to a proper understanding of the present invention.

Referring to the drawings, the sub-grader members 1 are of usual form and upon the frame carrying the same is mounted the motor or engine, and from this engine, by

means of belt 2 passing overa pulley 3 on the transverse shaft 4, motion is given to the parts by means of power derived from such engine or motor. On this shaft 4 are the elevators or pick-up devices which are designed to pickup the earth after it has been loosened by the sub-grader. These pick-up devices may be of any form adapted for the purpose and the present construction is as follows :-5 is a hub adapted to be secured to the shaft 4 in any suitable manner and radiating therefrom are the pick-up blades 6, the free ends of which are curved, as seen at 7, and may be more or less tapered for an obvious purpose. As seen in Figure 1, there are two of these pick-up devices herein illustrated, but it is to be understoodthat the invention is not restricted to such number. The shaft 1 is supported insuitable bearings 8 in hangers 9 depending from the cross pins 10, as seen in Figure 1.

It is to be noted that each pick-up device or elevator is so co-related with the subgrader members 1 as to pick up all the dirt as it is brought to its position by such members, and at a point in proximity to each pickup device I arrange an upwardly and rearwardly curved guide member or deflector 11, as seen best in Figure 3, so disposed with relation to the pick-up device as to be substantially concentric with the path traversed by the outer edges of the blades or radial arms thereof.

The guide or member 11 extends beneath the pick-up and serves to catch any dirt that is not delivered from the blades of the pickup to the conveyor belt, soon to be described, and conveys the same back to the ground where it is picked up by the succeeding revolutions of the blades, in addition to serving to receive the scraped-up dirt.

In order to convey the dirt, etc, thus picked up by the pick-up device or devices just described, I provide the endless conveyor 12, seen clearly in Figure 1, arranged at the rear and extending transversely of the length or direction of travel of the subgrader. This conveyor may be of any of the well-known or approved forms of end less belts or bands adapted for this purpose and is passed over pulleys 13, 14L- and 15, the former being mounted on a shaft 16 supported in the angular arm 17, as seen in Figure 1. Motion is conveyed to this conveyor in any suitable manner, as, for instance, by means of a. pulley 18 on the shaft 4 around which passes a belt 19 passing also around a pulley 20 on a shaft 21 mounted in suit-able bearings 22 depending from the transverse member 10, all as seen in Figure l, and this shaft 21 carrying a bevel gear 23 meshing with a bevel gear 24 on the shaft 25 mounted in suitable bearings whereby mo tion' is conveyed to the conveyor 12 in the direction of the arrow seen in Figure 1.

In order that; the conveyor may carry the dirtso as todischarge it at one side of the roadway without; danger of scattering the same, I provide suitable means to press upon opposite edges of the belt or conveyor soas todepressthe same. F igure-3 clearly illustrates. the means for thus troughing the conveyor. As seen in this view and as will be readily understood upon reference to Figures 1 and 2 also, I arrange at intervals throughout the length ofthe conveyor on its upper flight pressure rollers26, the shafts 27 ofwhich are inclineddownwardly at their inner ends, as seen clearly in Figure 3, these shafts being mounted in suitable bearings28, asseen alsoin said figure, and these shafts carried by the upright members 29 supported by the horizontal member 30 suitably supported from the framework. As will be readily understood, these rollers tend. to trough the conveyor so that the edges are made higher than the center so as to prevent the earth from falling over the edges thereof.

As seenvin Figures 1 and 4:, the pick-up blades 6 are so arranged as to overlie the conveyor .12 so that the dirt is all carried positively to a point above and droppedonto the conve or 12.

From tie foregoing the operation will be readily understood, and, briefly stated, is as follows :-As the sub-grader, with my improvements attached thereto, moves along, the earth is looseneda-n'd scraped to the rear as usual, Where it is picked up by the pick up devices or elevators and delivered on to the conveyor by which it is carried in the direction ofthe arrow on such conveyor in Figure l to the side of the road'and there delivered.

The parts are desi ned to move in unison and the motive power tor actuating the pick-up an d conveyorbeing derived from the motive power of the sub-grader,- econoiny ofoperation is assured and the dirt is conveyed to one side of the road as fast as the sub-grader proceeds.

Modifications in details may be resorted to without departing from thespirit of the invention ,or sacrificing any of itsadvantages.

What is claimed as new is 1. A sub-grader attachment comprising a rotary pick-up device and a conveyor over which the blades of the saidpick-up device extend to drop the earth thereon, said conveyor movable'transversely of the direction oftrave'l of the subegrader and co-related with the pick-up device to receive earth directly therefrom and means common to the pick-up devices and-conveyor for supporting them. i j v V .2. A sub-grader attachment comprising a rotary pick-up deviceoperable' from the motive power of the subgrader, a laterally movable conveyor positioned to-receive the earth directly from and operable from the pick-up device theblades of the pick-up de vice being curved andfloverlying the conveyor to carry the dirt to a point above'the level thereof and drop it thereon, and a curved guide interposed between the pick-up device and the adjacent edge ofthe conveyor and disposed substantially concentric with the path traversed by blades of the pick-up device.

3. A sub-grader attachment comprisinga rotary pick-up device, a conveyor movable transversely of the direction of travel of the sub-graderand co-related with the; pick-up device to receive earth directly. therefrom, the blades of the pick-up device being curved and overlying the conveyor to carry the dirt to a point above the level thereof and drop it thereon, and mean'sf or troughing theconveyor throughout its upper run.

In testimony whereof I afiixmy signature.

THoMAs LUCIAN AVERY.

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